I have the lume cube air, and honestly I thought it would be more useful than it is. Even shooting decent amount of night photography, I find that it doesn't do anything that my spare headlamp can't do. I'm sure they're great for some people, but mine has just collected dust for the past couple years. I've thought about selling it, but it probably isn't worth much.
One of my biggest issues with it is that it's just something else to remember to recharge. Because I use it so infrequently, it's likely to be dead or nearly so when I actually want to pull it out. I'd far prefer something similar that takes AAA or AA batteries (like a headlamp) so that I can just keep a spare set in my bag next to it.
If anyone here wants it to play with and test out I'd let it go for super cheap. Shoot me a DM.